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09c434b8 | 1 | // SPDX-License-Identifier: GPL-2.0-only |
1da177e4 LT |
2 | /* |
3 | * sr.c Copyright (C) 1992 David Giller | |
4 | * Copyright (C) 1993, 1994, 1995, 1999 Eric Youngdale | |
5 | * | |
6 | * adapted from: | |
7 | * sd.c Copyright (C) 1992 Drew Eckhardt | |
8 | * Linux scsi disk driver by | |
9 | * Drew Eckhardt <drew@colorado.edu> | |
10 | * | |
11 | * Modified by Eric Youngdale ericy@andante.org to | |
12 | * add scatter-gather, multiple outstanding request, and other | |
13 | * enhancements. | |
14 | * | |
15 | * Modified by Eric Youngdale eric@andante.org to support loadable | |
16 | * low-level scsi drivers. | |
17 | * | |
18 | * Modified by Thomas Quinot thomas@melchior.cuivre.fdn.fr to | |
19 | * provide auto-eject. | |
20 | * | |
21 | * Modified by Gerd Knorr <kraxel@cs.tu-berlin.de> to support the | |
22 | * generic cdrom interface | |
23 | * | |
24 | * Modified by Jens Axboe <axboe@suse.de> - Uniform sr_packet() | |
25 | * interface, capabilities probe additions, ioctl cleanups, etc. | |
26 | * | |
27 | * Modified by Richard Gooch <rgooch@atnf.csiro.au> to support devfs | |
28 | * | |
29 | * Modified by Jens Axboe <axboe@suse.de> - support DVD-RAM | |
30 | * transparently and lose the GHOST hack | |
31 | * | |
32 | * Modified by Arnaldo Carvalho de Melo <acme@conectiva.com.br> | |
33 | * check resource allocation in sr_init and some cleanups | |
34 | */ | |
35 | ||
36 | #include <linux/module.h> | |
37 | #include <linux/fs.h> | |
38 | #include <linux/kernel.h> | |
1da177e4 LT |
39 | #include <linux/mm.h> |
40 | #include <linux/bio.h> | |
d320a955 | 41 | #include <linux/compat.h> |
1da177e4 LT |
42 | #include <linux/string.h> |
43 | #include <linux/errno.h> | |
44 | #include <linux/cdrom.h> | |
45 | #include <linux/interrupt.h> | |
46 | #include <linux/init.h> | |
b81e0c23 | 47 | #include <linux/major.h> |
1da177e4 | 48 | #include <linux/blkdev.h> |
bca6b067 | 49 | #include <linux/blk-pm.h> |
0b950672 | 50 | #include <linux/mutex.h> |
5a0e3ad6 | 51 | #include <linux/slab.h> |
6c7f1e2f | 52 | #include <linux/pm_runtime.h> |
7c0f6ba6 | 53 | #include <linux/uaccess.h> |
1da177e4 | 54 | |
655da8e5 BVA |
55 | #include <asm/unaligned.h> |
56 | ||
1da177e4 LT |
57 | #include <scsi/scsi.h> |
58 | #include <scsi/scsi_dbg.h> | |
59 | #include <scsi/scsi_device.h> | |
60 | #include <scsi/scsi_driver.h> | |
820732b5 | 61 | #include <scsi/scsi_cmnd.h> |
1da177e4 LT |
62 | #include <scsi/scsi_eh.h> |
63 | #include <scsi/scsi_host.h> | |
64 | #include <scsi/scsi_ioctl.h> /* For the door lock/unlock commands */ | |
1da177e4 LT |
65 | |
66 | #include "scsi_logging.h" | |
67 | #include "sr.h" | |
68 | ||
69 | ||
f018fa55 RH |
70 | MODULE_DESCRIPTION("SCSI cdrom (sr) driver"); |
71 | MODULE_LICENSE("GPL"); | |
72 | MODULE_ALIAS_BLOCKDEV_MAJOR(SCSI_CDROM_MAJOR); | |
d7b8bcb0 MT |
73 | MODULE_ALIAS_SCSI_DEVICE(TYPE_ROM); |
74 | MODULE_ALIAS_SCSI_DEVICE(TYPE_WORM); | |
f018fa55 | 75 | |
1da177e4 LT |
76 | #define SR_DISKS 256 |
77 | ||
1da177e4 LT |
78 | #define SR_CAPABILITIES \ |
79 | (CDC_CLOSE_TRAY|CDC_OPEN_TRAY|CDC_LOCK|CDC_SELECT_SPEED| \ | |
80 | CDC_SELECT_DISC|CDC_MULTI_SESSION|CDC_MCN|CDC_MEDIA_CHANGED| \ | |
6a2900b6 | 81 | CDC_PLAY_AUDIO|CDC_RESET|CDC_DRIVE_STATUS| \ |
1da177e4 LT |
82 | CDC_CD_R|CDC_CD_RW|CDC_DVD|CDC_DVD_R|CDC_DVD_RAM|CDC_GENERIC_PACKET| \ |
83 | CDC_MRW|CDC_MRW_W|CDC_RAM) | |
84 | ||
85 | static int sr_probe(struct device *); | |
86 | static int sr_remove(struct device *); | |
159b2cbf | 87 | static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt); |
7b3d9545 | 88 | static int sr_done(struct scsi_cmnd *); |
6c7f1e2f AL |
89 | static int sr_runtime_suspend(struct device *dev); |
90 | ||
a816b4c6 | 91 | static const struct dev_pm_ops sr_pm_ops = { |
6c7f1e2f AL |
92 | .runtime_suspend = sr_runtime_suspend, |
93 | }; | |
1da177e4 LT |
94 | |
95 | static struct scsi_driver sr_template = { | |
1da177e4 LT |
96 | .gendrv = { |
97 | .name = "sr", | |
3af6b352 | 98 | .owner = THIS_MODULE, |
1da177e4 LT |
99 | .probe = sr_probe, |
100 | .remove = sr_remove, | |
6c7f1e2f | 101 | .pm = &sr_pm_ops, |
1da177e4 | 102 | }, |
a1b73fc1 | 103 | .init_command = sr_init_command, |
7b3d9545 | 104 | .done = sr_done, |
1da177e4 LT |
105 | }; |
106 | ||
107 | static unsigned long sr_index_bits[SR_DISKS / BITS_PER_LONG]; | |
108 | static DEFINE_SPINLOCK(sr_index_lock); | |
109 | ||
9c2b9dba CH |
110 | static struct lock_class_key sr_bio_compl_lkclass; |
111 | ||
1da177e4 LT |
112 | static int sr_open(struct cdrom_device_info *, int); |
113 | static void sr_release(struct cdrom_device_info *); | |
114 | ||
115 | static void get_sectorsize(struct scsi_cd *); | |
ebc95c79 | 116 | static int get_capabilities(struct scsi_cd *); |
1da177e4 | 117 | |
93aae17a TH |
118 | static unsigned int sr_check_events(struct cdrom_device_info *cdi, |
119 | unsigned int clearing, int slot); | |
1da177e4 | 120 | static int sr_packet(struct cdrom_device_info *, struct packet_command *); |
ba51bdaf CH |
121 | static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf, |
122 | u32 lba, u32 nr, u8 *last_sense); | |
1da177e4 | 123 | |
853fe1bf | 124 | static const struct cdrom_device_ops sr_dops = { |
1da177e4 LT |
125 | .open = sr_open, |
126 | .release = sr_release, | |
127 | .drive_status = sr_drive_status, | |
93aae17a | 128 | .check_events = sr_check_events, |
1da177e4 LT |
129 | .tray_move = sr_tray_move, |
130 | .lock_door = sr_lock_door, | |
131 | .select_speed = sr_select_speed, | |
132 | .get_last_session = sr_get_last_session, | |
133 | .get_mcn = sr_get_mcn, | |
134 | .reset = sr_reset, | |
135 | .audio_ioctl = sr_audio_ioctl, | |
1da177e4 | 136 | .generic_packet = sr_packet, |
ba51bdaf CH |
137 | .read_cdda_bpc = sr_read_cdda_bpc, |
138 | .capability = SR_CAPABILITIES, | |
1da177e4 LT |
139 | }; |
140 | ||
1da177e4 LT |
141 | static inline struct scsi_cd *scsi_cd(struct gendisk *disk) |
142 | { | |
e7f76552 | 143 | return disk->private_data; |
1da177e4 LT |
144 | } |
145 | ||
6c7f1e2f AL |
146 | static int sr_runtime_suspend(struct device *dev) |
147 | { | |
148 | struct scsi_cd *cd = dev_get_drvdata(dev); | |
149 | ||
13b43891 AS |
150 | if (!cd) /* E.g.: runtime suspend following sr_remove() */ |
151 | return 0; | |
152 | ||
6c7f1e2f AL |
153 | if (cd->media_present) |
154 | return -EBUSY; | |
155 | else | |
156 | return 0; | |
157 | } | |
158 | ||
93aae17a TH |
159 | static unsigned int sr_get_events(struct scsi_device *sdev) |
160 | { | |
161 | u8 buf[8]; | |
162 | u8 cmd[] = { GET_EVENT_STATUS_NOTIFICATION, | |
163 | 1, /* polled */ | |
164 | 0, 0, /* reserved */ | |
165 | 1 << 4, /* notification class: media */ | |
166 | 0, 0, /* reserved */ | |
167 | 0, sizeof(buf), /* allocation length */ | |
168 | 0, /* control */ | |
169 | }; | |
170 | struct event_header *eh = (void *)buf; | |
171 | struct media_event_desc *med = (void *)(buf + 4); | |
172 | struct scsi_sense_hdr sshdr; | |
173 | int result; | |
174 | ||
175 | result = scsi_execute_req(sdev, cmd, DMA_FROM_DEVICE, buf, sizeof(buf), | |
176 | &sshdr, SR_TIMEOUT, MAX_RETRIES, NULL); | |
177 | if (scsi_sense_valid(&sshdr) && sshdr.sense_key == UNIT_ATTENTION) | |
178 | return DISK_EVENT_MEDIA_CHANGE; | |
179 | ||
180 | if (result || be16_to_cpu(eh->data_len) < sizeof(*med)) | |
181 | return 0; | |
182 | ||
183 | if (eh->nea || eh->notification_class != 0x4) | |
184 | return 0; | |
185 | ||
186 | if (med->media_event_code == 1) | |
187 | return DISK_EVENT_EJECT_REQUEST; | |
188 | else if (med->media_event_code == 2) | |
189 | return DISK_EVENT_MEDIA_CHANGE; | |
7dd753ca | 190 | else if (med->media_event_code == 3) |
5c04243a | 191 | return DISK_EVENT_MEDIA_CHANGE; |
93aae17a TH |
192 | return 0; |
193 | } | |
194 | ||
1da177e4 | 195 | /* |
93aae17a TH |
196 | * This function checks to see if the media has been changed or eject |
197 | * button has been pressed. It is possible that we have already | |
198 | * sensed a change, or the drive may have sensed one and not yet | |
199 | * reported it. The past events are accumulated in sdev->changed and | |
200 | * returned together with the current state. | |
1da177e4 | 201 | */ |
93aae17a TH |
202 | static unsigned int sr_check_events(struct cdrom_device_info *cdi, |
203 | unsigned int clearing, int slot) | |
1da177e4 LT |
204 | { |
205 | struct scsi_cd *cd = cdi->handle; | |
93aae17a TH |
206 | bool last_present; |
207 | struct scsi_sense_hdr sshdr; | |
208 | unsigned int events; | |
209 | int ret; | |
1da177e4 | 210 | |
93aae17a TH |
211 | /* no changer support */ |
212 | if (CDSL_CURRENT != slot) | |
213 | return 0; | |
214 | ||
215 | events = sr_get_events(cd->device); | |
79b9677d KS |
216 | cd->get_event_changed |= events & DISK_EVENT_MEDIA_CHANGE; |
217 | ||
218 | /* | |
219 | * If earlier GET_EVENT_STATUS_NOTIFICATION and TUR did not agree | |
220 | * for several times in a row. We rely on TUR only for this likely | |
221 | * broken device, to prevent generating incorrect media changed | |
222 | * events for every open(). | |
223 | */ | |
224 | if (cd->ignore_get_event) { | |
225 | events &= ~DISK_EVENT_MEDIA_CHANGE; | |
226 | goto do_tur; | |
227 | } | |
228 | ||
93aae17a TH |
229 | /* |
230 | * GET_EVENT_STATUS_NOTIFICATION is enough unless MEDIA_CHANGE | |
231 | * is being cleared. Note that there are devices which hang | |
232 | * if asked to execute TUR repeatedly. | |
233 | */ | |
79b9677d KS |
234 | if (cd->device->changed) { |
235 | events |= DISK_EVENT_MEDIA_CHANGE; | |
236 | cd->device->changed = 0; | |
237 | cd->tur_changed = true; | |
238 | } | |
93aae17a | 239 | |
79b9677d KS |
240 | if (!(clearing & DISK_EVENT_MEDIA_CHANGE)) |
241 | return events; | |
242 | do_tur: | |
93aae17a TH |
243 | /* let's see whether the media is there with TUR */ |
244 | last_present = cd->media_present; | |
245 | ret = scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr); | |
1da177e4 | 246 | |
638428ec TH |
247 | /* |
248 | * Media is considered to be present if TUR succeeds or fails with | |
249 | * sense data indicating something other than media-not-present | |
250 | * (ASC 0x3a). | |
251 | */ | |
93aae17a TH |
252 | cd->media_present = scsi_status_is_good(ret) || |
253 | (scsi_sense_valid(&sshdr) && sshdr.asc != 0x3a); | |
1da177e4 | 254 | |
93aae17a | 255 | if (last_present != cd->media_present) |
79b9677d KS |
256 | cd->device->changed = 1; |
257 | ||
93aae17a TH |
258 | if (cd->device->changed) { |
259 | events |= DISK_EVENT_MEDIA_CHANGE; | |
260 | cd->device->changed = 0; | |
79b9677d KS |
261 | cd->tur_changed = true; |
262 | } | |
263 | ||
264 | if (cd->ignore_get_event) | |
265 | return events; | |
266 | ||
267 | /* check whether GET_EVENT is reporting spurious MEDIA_CHANGE */ | |
268 | if (!cd->tur_changed) { | |
269 | if (cd->get_event_changed) { | |
270 | if (cd->tur_mismatch++ > 8) { | |
96eefad2 HR |
271 | sr_printk(KERN_WARNING, cd, |
272 | "GET_EVENT and TUR disagree continuously, suppress GET_EVENT events\n"); | |
79b9677d KS |
273 | cd->ignore_get_event = true; |
274 | } | |
275 | } else { | |
276 | cd->tur_mismatch = 0; | |
277 | } | |
1da177e4 | 278 | } |
79b9677d KS |
279 | cd->tur_changed = false; |
280 | cd->get_event_changed = false; | |
285e9670 | 281 | |
93aae17a | 282 | return events; |
1da177e4 | 283 | } |
93aae17a | 284 | |
1da177e4 | 285 | /* |
7b3d9545 | 286 | * sr_done is the interrupt routine for the device driver. |
1da177e4 | 287 | * |
7b3d9545 | 288 | * It will be notified on the end of a SCSI read / write, and will take one |
1da177e4 LT |
289 | * of several actions based on success or failure. |
290 | */ | |
7b3d9545 | 291 | static int sr_done(struct scsi_cmnd *SCpnt) |
1da177e4 LT |
292 | { |
293 | int result = SCpnt->result; | |
30b0c37b | 294 | int this_count = scsi_bufflen(SCpnt); |
1da177e4 LT |
295 | int good_bytes = (result == 0 ? this_count : 0); |
296 | int block_sectors = 0; | |
297 | long error_sector; | |
c4deb5b5 | 298 | struct request *rq = scsi_cmd_to_rq(SCpnt); |
f3fa33ac | 299 | struct scsi_cd *cd = scsi_cd(rq->q->disk); |
1da177e4 LT |
300 | |
301 | #ifdef DEBUG | |
96eefad2 | 302 | scmd_printk(KERN_INFO, SCpnt, "done: %x\n", result); |
1da177e4 LT |
303 | #endif |
304 | ||
305 | /* | |
306 | * Handle MEDIUM ERRORs or VOLUME OVERFLOWs that indicate partial | |
307 | * success. Since this is a relatively rare error condition, no | |
308 | * care is taken to avoid unnecessary additional work such as | |
309 | * memcpy's that could be avoided. | |
310 | */ | |
3d45cefc | 311 | if (scsi_status_is_check_condition(result) && |
1da177e4 LT |
312 | (SCpnt->sense_buffer[0] & 0x7f) == 0x70) { /* Sense current */ |
313 | switch (SCpnt->sense_buffer[2]) { | |
314 | case MEDIUM_ERROR: | |
315 | case VOLUME_OVERFLOW: | |
316 | case ILLEGAL_REQUEST: | |
317 | if (!(SCpnt->sense_buffer[0] & 0x90)) | |
318 | break; | |
655da8e5 BVA |
319 | error_sector = |
320 | get_unaligned_be32(&SCpnt->sense_buffer[3]); | |
c4deb5b5 BVA |
321 | if (rq->bio != NULL) |
322 | block_sectors = bio_sectors(rq->bio); | |
1da177e4 LT |
323 | if (block_sectors < 4) |
324 | block_sectors = 4; | |
325 | if (cd->device->sector_size == 2048) | |
326 | error_sector <<= 2; | |
327 | error_sector &= ~(block_sectors - 1); | |
c4deb5b5 | 328 | good_bytes = (error_sector - blk_rq_pos(rq)) << 9; |
1da177e4 LT |
329 | if (good_bytes < 0 || good_bytes >= this_count) |
330 | good_bytes = 0; | |
331 | /* | |
332 | * The SCSI specification allows for the value | |
333 | * returned by READ CAPACITY to be up to 75 2K | |
334 | * sectors past the last readable block. | |
335 | * Therefore, if we hit a medium error within the | |
336 | * last 75 2K sectors, we decrease the saved size | |
337 | * value. | |
338 | */ | |
339 | if (error_sector < get_capacity(cd->disk) && | |
340 | cd->capacity - error_sector < 4 * 75) | |
341 | set_capacity(cd->disk, error_sector); | |
342 | break; | |
343 | ||
344 | case RECOVERED_ERROR: | |
1da177e4 LT |
345 | good_bytes = this_count; |
346 | break; | |
347 | ||
348 | default: | |
349 | break; | |
350 | } | |
351 | } | |
352 | ||
7b3d9545 | 353 | return good_bytes; |
1da177e4 LT |
354 | } |
355 | ||
159b2cbf | 356 | static blk_status_t sr_init_command(struct scsi_cmnd *SCpnt) |
1da177e4 | 357 | { |
242f9dcb | 358 | int block = 0, this_count, s_size; |
7f9a6bc4 | 359 | struct scsi_cd *cd; |
c4deb5b5 | 360 | struct request *rq = scsi_cmd_to_rq(SCpnt); |
159b2cbf | 361 | blk_status_t ret; |
7f9a6bc4 | 362 | |
7007e9dd | 363 | ret = scsi_alloc_sgtables(SCpnt); |
159b2cbf | 364 | if (ret != BLK_STS_OK) |
7007e9dd | 365 | return ret; |
f3fa33ac | 366 | cd = scsi_cd(rq->q->disk); |
7f9a6bc4 | 367 | |
96eefad2 HR |
368 | SCSI_LOG_HLQUEUE(1, scmd_printk(KERN_INFO, SCpnt, |
369 | "Doing sr request, block = %d\n", block)); | |
1da177e4 LT |
370 | |
371 | if (!cd->device || !scsi_device_online(cd->device)) { | |
96eefad2 HR |
372 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
373 | "Finishing %u sectors\n", blk_rq_sectors(rq))); | |
374 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, | |
375 | "Retry with 0x%p\n", SCpnt)); | |
7f9a6bc4 | 376 | goto out; |
1da177e4 LT |
377 | } |
378 | ||
379 | if (cd->device->changed) { | |
380 | /* | |
381 | * quietly refuse to do anything to a changed disc until the | |
382 | * changed bit has been reset | |
383 | */ | |
7f9a6bc4 | 384 | goto out; |
1da177e4 LT |
385 | } |
386 | ||
1da177e4 | 387 | s_size = cd->device->sector_size; |
1da177e4 | 388 | if (s_size != 512 && s_size != 1024 && s_size != 2048) { |
3bf743e7 | 389 | scmd_printk(KERN_ERR, SCpnt, "bad sector size %d\n", s_size); |
7f9a6bc4 | 390 | goto out; |
1da177e4 LT |
391 | } |
392 | ||
aebf526b CH |
393 | switch (req_op(rq)) { |
394 | case REQ_OP_WRITE: | |
fd2eb903 | 395 | if (!cd->writeable) |
7f9a6bc4 | 396 | goto out; |
1da177e4 | 397 | SCpnt->cmnd[0] = WRITE_10; |
96eefad2 | 398 | cd->cdi.media_written = 1; |
aebf526b CH |
399 | break; |
400 | case REQ_OP_READ: | |
1da177e4 | 401 | SCpnt->cmnd[0] = READ_10; |
aebf526b CH |
402 | break; |
403 | default: | |
7f9a6bc4 JB |
404 | blk_dump_rq_flags(rq, "Unknown sr command"); |
405 | goto out; | |
1da177e4 LT |
406 | } |
407 | ||
408 | { | |
30b0c37b BH |
409 | struct scatterlist *sg; |
410 | int i, size = 0, sg_count = scsi_sg_count(SCpnt); | |
1da177e4 | 411 | |
30b0c37b BH |
412 | scsi_for_each_sg(SCpnt, sg, sg_count, i) |
413 | size += sg->length; | |
414 | ||
415 | if (size != scsi_bufflen(SCpnt)) { | |
3bf743e7 JG |
416 | scmd_printk(KERN_ERR, SCpnt, |
417 | "mismatch count %d, bytes %d\n", | |
30b0c37b BH |
418 | size, scsi_bufflen(SCpnt)); |
419 | if (scsi_bufflen(SCpnt) > size) | |
420 | SCpnt->sdb.length = size; | |
1da177e4 LT |
421 | } |
422 | } | |
423 | ||
424 | /* | |
425 | * request doesn't start on hw block boundary, add scatter pads | |
426 | */ | |
83096ebf | 427 | if (((unsigned int)blk_rq_pos(rq) % (s_size >> 9)) || |
30b0c37b | 428 | (scsi_bufflen(SCpnt) % s_size)) { |
3bf743e7 | 429 | scmd_printk(KERN_NOTICE, SCpnt, "unaligned transfer\n"); |
7f9a6bc4 | 430 | goto out; |
1da177e4 LT |
431 | } |
432 | ||
30b0c37b | 433 | this_count = (scsi_bufflen(SCpnt) >> 9) / (s_size >> 9); |
1da177e4 LT |
434 | |
435 | ||
96eefad2 HR |
436 | SCSI_LOG_HLQUEUE(2, scmd_printk(KERN_INFO, SCpnt, |
437 | "%s %d/%u 512 byte blocks.\n", | |
438 | (rq_data_dir(rq) == WRITE) ? | |
1da177e4 | 439 | "writing" : "reading", |
96eefad2 | 440 | this_count, blk_rq_sectors(rq))); |
1da177e4 LT |
441 | |
442 | SCpnt->cmnd[1] = 0; | |
83096ebf | 443 | block = (unsigned int)blk_rq_pos(rq) / (s_size >> 9); |
1da177e4 LT |
444 | |
445 | if (this_count > 0xffff) { | |
446 | this_count = 0xffff; | |
30b0c37b | 447 | SCpnt->sdb.length = this_count * s_size; |
1da177e4 LT |
448 | } |
449 | ||
655da8e5 | 450 | put_unaligned_be32(block, &SCpnt->cmnd[2]); |
1da177e4 | 451 | SCpnt->cmnd[6] = SCpnt->cmnd[9] = 0; |
655da8e5 | 452 | put_unaligned_be16(this_count, &SCpnt->cmnd[7]); |
1da177e4 LT |
453 | |
454 | /* | |
455 | * We shouldn't disconnect in the middle of a sector, so with a dumb | |
456 | * host adapter, it's safe to assume that we can at least transfer | |
457 | * this many bytes between each connect / disconnect. | |
458 | */ | |
459 | SCpnt->transfersize = cd->device->sector_size; | |
460 | SCpnt->underflow = this_count << 9; | |
1da177e4 | 461 | SCpnt->allowed = MAX_RETRIES; |
9120ac54 | 462 | SCpnt->cmd_len = 10; |
1da177e4 | 463 | |
1da177e4 | 464 | /* |
7007e9dd | 465 | * This indicates that the command is ready from our end to be queued. |
1da177e4 | 466 | */ |
7007e9dd | 467 | return BLK_STS_OK; |
7f9a6bc4 | 468 | out: |
7007e9dd CH |
469 | scsi_free_sgtables(SCpnt); |
470 | return BLK_STS_IOERR; | |
1da177e4 LT |
471 | } |
472 | ||
38a2b557 CH |
473 | static void sr_revalidate_disk(struct scsi_cd *cd) |
474 | { | |
475 | struct scsi_sense_hdr sshdr; | |
476 | ||
477 | /* if the unit is not ready, nothing more to do */ | |
478 | if (scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr)) | |
479 | return; | |
480 | sr_cd_check(&cd->cdi); | |
481 | get_sectorsize(cd); | |
482 | } | |
483 | ||
40cc51be | 484 | static int sr_block_open(struct block_device *bdev, fmode_t mode) |
1da177e4 | 485 | { |
79d45f57 | 486 | struct scsi_cd *cd = scsi_cd(bdev->bd_disk); |
01d0c698 | 487 | struct scsi_device *sdev = cd->device; |
79d45f57 | 488 | int ret; |
1da177e4 | 489 | |
01d0c698 CH |
490 | if (scsi_device_get(cd->device)) |
491 | return -ENXIO; | |
1214fd7b | 492 | |
1214fd7b | 493 | scsi_autopm_get_device(sdev); |
afd35c4f | 494 | if (bdev_check_media_change(bdev)) |
38a2b557 | 495 | sr_revalidate_disk(cd); |
2bbea6e1 | 496 | |
51a85881 | 497 | mutex_lock(&cd->lock); |
1214fd7b | 498 | ret = cdrom_open(&cd->cdi, bdev, mode); |
51a85881 | 499 | mutex_unlock(&cd->lock); |
1214fd7b BVA |
500 | |
501 | scsi_autopm_put_device(sdev); | |
502 | if (ret) | |
01d0c698 | 503 | scsi_device_put(cd->device); |
1da177e4 LT |
504 | return ret; |
505 | } | |
506 | ||
db2a144b | 507 | static void sr_block_release(struct gendisk *disk, fmode_t mode) |
1da177e4 | 508 | { |
40cc51be | 509 | struct scsi_cd *cd = scsi_cd(disk); |
72655c0e | 510 | |
51a85881 | 511 | mutex_lock(&cd->lock); |
40cc51be | 512 | cdrom_release(&cd->cdi, mode); |
51a85881 | 513 | mutex_unlock(&cd->lock); |
72655c0e | 514 | |
01d0c698 | 515 | scsi_device_put(cd->device); |
1da177e4 LT |
516 | } |
517 | ||
40cc51be | 518 | static int sr_block_ioctl(struct block_device *bdev, fmode_t mode, unsigned cmd, |
1da177e4 LT |
519 | unsigned long arg) |
520 | { | |
a30e3441 | 521 | struct scsi_cd *cd = scsi_cd(bdev->bd_disk); |
1da177e4 | 522 | struct scsi_device *sdev = cd->device; |
6a2900b6 CH |
523 | void __user *argp = (void __user *)arg; |
524 | int ret; | |
1da177e4 | 525 | |
4f07bfc5 CH |
526 | if (bdev_is_partition(bdev) && !capable(CAP_SYS_RAWIO)) |
527 | return -ENOIOCTLCMD; | |
d320a955 | 528 | |
51a85881 | 529 | mutex_lock(&cd->lock); |
d320a955 AB |
530 | |
531 | ret = scsi_ioctl_block_when_processing_errors(sdev, cmd, | |
532 | (mode & FMODE_NDELAY) != 0); | |
533 | if (ret) | |
534 | goto out; | |
535 | ||
536 | scsi_autopm_get_device(sdev); | |
537 | ||
bc5519c1 | 538 | if (cmd != CDROMCLOSETRAY && cmd != CDROMEJECT) { |
558e3fbe CH |
539 | ret = cdrom_ioctl(&cd->cdi, bdev, mode, cmd, arg); |
540 | if (ret != -ENOSYS) | |
541 | goto put; | |
d320a955 | 542 | } |
a30e3441 | 543 | ret = scsi_ioctl(sdev, mode, cmd, argp); |
d320a955 AB |
544 | |
545 | put: | |
546 | scsi_autopm_put_device(sdev); | |
d320a955 | 547 | out: |
51a85881 | 548 | mutex_unlock(&cd->lock); |
d320a955 | 549 | return ret; |
d320a955 | 550 | } |
d320a955 | 551 | |
93aae17a TH |
552 | static unsigned int sr_block_check_events(struct gendisk *disk, |
553 | unsigned int clearing) | |
1da177e4 | 554 | { |
01d0c698 | 555 | struct scsi_cd *cd = disk->private_data; |
6c7f1e2f | 556 | |
01d0c698 | 557 | if (atomic_read(&cd->device->disk_events_disable_depth)) |
6627b38f | 558 | return 0; |
01d0c698 CH |
559 | return cdrom_check_events(&cd->cdi, clearing); |
560 | } | |
6c7f1e2f | 561 | |
01d0c698 CH |
562 | static void sr_free_disk(struct gendisk *disk) |
563 | { | |
564 | struct scsi_cd *cd = disk->private_data; | |
2d097c50 | 565 | |
01d0c698 CH |
566 | spin_lock(&sr_index_lock); |
567 | clear_bit(MINOR(disk_devt(disk)), sr_index_bits); | |
568 | spin_unlock(&sr_index_lock); | |
569 | ||
570 | unregister_cdrom(&cd->cdi); | |
571 | mutex_destroy(&cd->lock); | |
572 | kfree(cd); | |
93aae17a TH |
573 | } |
574 | ||
83d5cde4 | 575 | static const struct block_device_operations sr_bdops = |
1da177e4 LT |
576 | { |
577 | .owner = THIS_MODULE, | |
40cc51be AV |
578 | .open = sr_block_open, |
579 | .release = sr_block_release, | |
8a6cfeb6 | 580 | .ioctl = sr_block_ioctl, |
558e3fbe | 581 | .compat_ioctl = blkdev_compat_ptr_ioctl, |
93aae17a | 582 | .check_events = sr_block_check_events, |
01d0c698 | 583 | .free_disk = sr_free_disk, |
1da177e4 LT |
584 | }; |
585 | ||
586 | static int sr_open(struct cdrom_device_info *cdi, int purpose) | |
587 | { | |
588 | struct scsi_cd *cd = cdi->handle; | |
589 | struct scsi_device *sdev = cd->device; | |
590 | int retval; | |
591 | ||
592 | /* | |
593 | * If the device is in error recovery, wait until it is done. | |
594 | * If the device is offline, then disallow any access to it. | |
595 | */ | |
596 | retval = -ENXIO; | |
597 | if (!scsi_block_when_processing_errors(sdev)) | |
598 | goto error_out; | |
599 | ||
1da177e4 LT |
600 | return 0; |
601 | ||
602 | error_out: | |
603 | return retval; | |
604 | } | |
605 | ||
606 | static void sr_release(struct cdrom_device_info *cdi) | |
607 | { | |
1da177e4 LT |
608 | } |
609 | ||
610 | static int sr_probe(struct device *dev) | |
611 | { | |
612 | struct scsi_device *sdev = to_scsi_device(dev); | |
613 | struct gendisk *disk; | |
614 | struct scsi_cd *cd; | |
615 | int minor, error; | |
616 | ||
6fe8c1db | 617 | scsi_autopm_get_device(sdev); |
1da177e4 LT |
618 | error = -ENODEV; |
619 | if (sdev->type != TYPE_ROM && sdev->type != TYPE_WORM) | |
620 | goto fail; | |
621 | ||
622 | error = -ENOMEM; | |
24669f75 | 623 | cd = kzalloc(sizeof(*cd), GFP_KERNEL); |
1da177e4 LT |
624 | if (!cd) |
625 | goto fail; | |
1da177e4 | 626 | |
6f8191fd CH |
627 | disk = blk_mq_alloc_disk_for_queue(sdev->request_queue, |
628 | &sr_bio_compl_lkclass); | |
1da177e4 LT |
629 | if (!disk) |
630 | goto fail_free; | |
51a85881 | 631 | mutex_init(&cd->lock); |
1da177e4 LT |
632 | |
633 | spin_lock(&sr_index_lock); | |
634 | minor = find_first_zero_bit(sr_index_bits, SR_DISKS); | |
635 | if (minor == SR_DISKS) { | |
636 | spin_unlock(&sr_index_lock); | |
637 | error = -EBUSY; | |
638 | goto fail_put; | |
639 | } | |
640 | __set_bit(minor, sr_index_bits); | |
641 | spin_unlock(&sr_index_lock); | |
642 | ||
643 | disk->major = SCSI_CDROM_MAJOR; | |
644 | disk->first_minor = minor; | |
a58bd768 | 645 | disk->minors = 1; |
1da177e4 LT |
646 | sprintf(disk->disk_name, "sr%d", minor); |
647 | disk->fops = &sr_bdops; | |
a4561f9f | 648 | disk->flags |= GENHD_FL_REMOVABLE | GENHD_FL_NO_PART; |
93aae17a | 649 | disk->events = DISK_EVENT_MEDIA_CHANGE | DISK_EVENT_EJECT_REQUEST; |
1545e0b4 CH |
650 | disk->event_flags = DISK_EVENT_FLAG_POLL | DISK_EVENT_FLAG_UEVENT | |
651 | DISK_EVENT_FLAG_BLOCK_ON_EXCL_WRITE; | |
1da177e4 | 652 | |
242f9dcb JA |
653 | blk_queue_rq_timeout(sdev->request_queue, SR_TIMEOUT); |
654 | ||
1da177e4 LT |
655 | cd->device = sdev; |
656 | cd->disk = disk; | |
1da177e4 | 657 | cd->capacity = 0x1fffff; |
1da177e4 | 658 | cd->device->changed = 1; /* force recheck CD type */ |
93aae17a | 659 | cd->media_present = 1; |
1da177e4 LT |
660 | cd->use = 1; |
661 | cd->readcd_known = 0; | |
662 | cd->readcd_cdda = 0; | |
663 | ||
664 | cd->cdi.ops = &sr_dops; | |
665 | cd->cdi.handle = cd; | |
666 | cd->cdi.mask = 0; | |
667 | cd->cdi.capacity = 1; | |
668 | sprintf(cd->cdi.name, "sr%d", minor); | |
669 | ||
670 | sdev->sector_size = 2048; /* A guess, just in case */ | |
671 | ||
ebc95c79 EL |
672 | error = -ENOMEM; |
673 | if (get_capabilities(cd)) | |
674 | goto fail_minor; | |
1da177e4 LT |
675 | sr_vendor_init(cd); |
676 | ||
1da177e4 | 677 | set_capacity(disk, cd->capacity); |
e7f76552 | 678 | disk->private_data = cd; |
1da177e4 | 679 | |
a711d91c | 680 | if (register_cdrom(disk, &cd->cdi)) |
6555781b | 681 | goto fail_minor; |
1da177e4 | 682 | |
6627b38f AL |
683 | /* |
684 | * Initialize block layer runtime PM stuffs before the | |
685 | * periodic event checking request gets started in add_disk. | |
686 | */ | |
687 | blk_pm_runtime_init(sdev->request_queue, dev); | |
688 | ||
1da177e4 | 689 | dev_set_drvdata(dev, cd); |
38a2b557 | 690 | sr_revalidate_disk(cd); |
e9d658c2 LC |
691 | |
692 | error = device_add_disk(&sdev->sdev_gendev, disk, NULL); | |
01d0c698 CH |
693 | if (error) |
694 | goto unregister_cdrom; | |
1da177e4 | 695 | |
9ccfc756 JB |
696 | sdev_printk(KERN_DEBUG, sdev, |
697 | "Attached scsi CD-ROM %s\n", cd->cdi.name); | |
6c7f1e2f AL |
698 | scsi_autopm_put_device(cd->device); |
699 | ||
1da177e4 LT |
700 | return 0; |
701 | ||
01d0c698 CH |
702 | unregister_cdrom: |
703 | unregister_cdrom(&cd->cdi); | |
6555781b SA |
704 | fail_minor: |
705 | spin_lock(&sr_index_lock); | |
706 | clear_bit(minor, sr_index_bits); | |
707 | spin_unlock(&sr_index_lock); | |
1da177e4 LT |
708 | fail_put: |
709 | put_disk(disk); | |
a247e07f | 710 | mutex_destroy(&cd->lock); |
1da177e4 LT |
711 | fail_free: |
712 | kfree(cd); | |
713 | fail: | |
6fe8c1db | 714 | scsi_autopm_put_device(sdev); |
1da177e4 LT |
715 | return error; |
716 | } | |
717 | ||
718 | ||
719 | static void get_sectorsize(struct scsi_cd *cd) | |
720 | { | |
721 | unsigned char cmd[10]; | |
62858dac | 722 | unsigned char buffer[8]; |
1da177e4 LT |
723 | int the_result, retries = 3; |
724 | int sector_size; | |
165125e1 | 725 | struct request_queue *queue; |
1da177e4 | 726 | |
1da177e4 LT |
727 | do { |
728 | cmd[0] = READ_CAPACITY; | |
729 | memset((void *) &cmd[1], 0, 9); | |
62858dac | 730 | memset(buffer, 0, sizeof(buffer)); |
1da177e4 LT |
731 | |
732 | /* Do the command and wait.. */ | |
820732b5 | 733 | the_result = scsi_execute_req(cd->device, cmd, DMA_FROM_DEVICE, |
62858dac | 734 | buffer, sizeof(buffer), NULL, |
f4f4e47e | 735 | SR_TIMEOUT, MAX_RETRIES, NULL); |
1da177e4 | 736 | |
1da177e4 LT |
737 | retries--; |
738 | ||
739 | } while (the_result && retries); | |
740 | ||
741 | ||
1da177e4 LT |
742 | if (the_result) { |
743 | cd->capacity = 0x1fffff; | |
744 | sector_size = 2048; /* A guess, just in case */ | |
1da177e4 | 745 | } else { |
5915136d TH |
746 | long last_written; |
747 | ||
655da8e5 | 748 | cd->capacity = 1 + get_unaligned_be32(&buffer[0]); |
5915136d TH |
749 | /* |
750 | * READ_CAPACITY doesn't return the correct size on | |
751 | * certain UDF media. If last_written is larger, use | |
752 | * it instead. | |
753 | * | |
754 | * http://bugzilla.kernel.org/show_bug.cgi?id=9668 | |
755 | */ | |
756 | if (!cdrom_get_last_written(&cd->cdi, &last_written)) | |
757 | cd->capacity = max_t(long, cd->capacity, last_written); | |
758 | ||
655da8e5 | 759 | sector_size = get_unaligned_be32(&buffer[4]); |
1da177e4 LT |
760 | switch (sector_size) { |
761 | /* | |
762 | * HP 4020i CD-Recorder reports 2340 byte sectors | |
763 | * Philips CD-Writers report 2352 byte sectors | |
764 | * | |
765 | * Use 2k sectors for them.. | |
766 | */ | |
767 | case 0: | |
768 | case 2340: | |
769 | case 2352: | |
770 | sector_size = 2048; | |
df561f66 | 771 | fallthrough; |
1da177e4 LT |
772 | case 2048: |
773 | cd->capacity *= 4; | |
df561f66 | 774 | fallthrough; |
1da177e4 LT |
775 | case 512: |
776 | break; | |
777 | default: | |
96eefad2 HR |
778 | sr_printk(KERN_INFO, cd, |
779 | "unsupported sector size %d.", sector_size); | |
1da177e4 | 780 | cd->capacity = 0; |
1da177e4 LT |
781 | } |
782 | ||
783 | cd->device->sector_size = sector_size; | |
784 | ||
785 | /* | |
786 | * Add this so that we have the ability to correctly gauge | |
787 | * what the device is capable of. | |
788 | */ | |
1da177e4 LT |
789 | set_capacity(cd->disk, cd->capacity); |
790 | } | |
791 | ||
792 | queue = cd->device->request_queue; | |
e1defc4f | 793 | blk_queue_logical_block_size(queue, sector_size); |
1da177e4 | 794 | |
62858dac | 795 | return; |
1da177e4 LT |
796 | } |
797 | ||
ebc95c79 | 798 | static int get_capabilities(struct scsi_cd *cd) |
1da177e4 LT |
799 | { |
800 | unsigned char *buffer; | |
801 | struct scsi_mode_data data; | |
820732b5 | 802 | struct scsi_sense_hdr sshdr; |
a00a7862 | 803 | unsigned int ms_len = 128; |
38582a62 | 804 | int rc, n; |
1da177e4 | 805 | |
0ad78200 | 806 | static const char *loadmech[] = |
1da177e4 LT |
807 | { |
808 | "caddy", | |
809 | "tray", | |
810 | "pop-up", | |
811 | "", | |
812 | "changer", | |
813 | "cartridge changer", | |
814 | "", | |
815 | "" | |
816 | }; | |
817 | ||
1da177e4 LT |
818 | |
819 | /* allocate transfer buffer */ | |
d94d9496 | 820 | buffer = kmalloc(512, GFP_KERNEL); |
1da177e4 | 821 | if (!buffer) { |
96eefad2 | 822 | sr_printk(KERN_ERR, cd, "out of memory.\n"); |
ebc95c79 | 823 | return -ENOMEM; |
1da177e4 LT |
824 | } |
825 | ||
38582a62 | 826 | /* eat unit attentions */ |
9f8a2c23 | 827 | scsi_test_unit_ready(cd->device, SR_TIMEOUT, MAX_RETRIES, &sshdr); |
1da177e4 LT |
828 | |
829 | /* ask for mode page 0x2a */ | |
a00a7862 | 830 | rc = scsi_mode_sense(cd->device, 0, 0x2a, buffer, ms_len, |
1cf72699 | 831 | SR_TIMEOUT, 3, &data, NULL); |
1da177e4 | 832 | |
8793613d | 833 | if (rc < 0 || data.length > ms_len || |
a00a7862 | 834 | data.header_length + data.block_descriptor_length > data.length) { |
1da177e4 LT |
835 | /* failed, drive doesn't have capabilities mode page */ |
836 | cd->cdi.speed = 1; | |
837 | cd->cdi.mask |= (CDC_CD_R | CDC_CD_RW | CDC_DVD_R | | |
bcc1e382 CE |
838 | CDC_DVD | CDC_DVD_RAM | |
839 | CDC_SELECT_DISC | CDC_SELECT_SPEED | | |
840 | CDC_MRW | CDC_MRW_W | CDC_RAM); | |
1da177e4 | 841 | kfree(buffer); |
96eefad2 | 842 | sr_printk(KERN_INFO, cd, "scsi-1 drive"); |
ebc95c79 | 843 | return 0; |
1da177e4 LT |
844 | } |
845 | ||
846 | n = data.header_length + data.block_descriptor_length; | |
655da8e5 | 847 | cd->cdi.speed = get_unaligned_be16(&buffer[n + 8]) / 176; |
1da177e4 LT |
848 | cd->readcd_known = 1; |
849 | cd->readcd_cdda = buffer[n + 5] & 0x01; | |
850 | /* print some capability bits */ | |
96eefad2 HR |
851 | sr_printk(KERN_INFO, cd, |
852 | "scsi3-mmc drive: %dx/%dx %s%s%s%s%s%s\n", | |
655da8e5 | 853 | get_unaligned_be16(&buffer[n + 14]) / 176, |
96eefad2 HR |
854 | cd->cdi.speed, |
855 | buffer[n + 3] & 0x01 ? "writer " : "", /* CD Writer */ | |
856 | buffer[n + 3] & 0x20 ? "dvd-ram " : "", | |
857 | buffer[n + 2] & 0x02 ? "cd/rw " : "", /* can read rewriteable */ | |
858 | buffer[n + 4] & 0x20 ? "xa/form2 " : "", /* can read xa/from2 */ | |
859 | buffer[n + 5] & 0x01 ? "cdda " : "", /* can read audio data */ | |
860 | loadmech[buffer[n + 6] >> 5]); | |
1da177e4 LT |
861 | if ((buffer[n + 6] >> 5) == 0) |
862 | /* caddy drives can't close tray... */ | |
863 | cd->cdi.mask |= CDC_CLOSE_TRAY; | |
864 | if ((buffer[n + 2] & 0x8) == 0) | |
865 | /* not a DVD drive */ | |
866 | cd->cdi.mask |= CDC_DVD; | |
96eefad2 | 867 | if ((buffer[n + 3] & 0x20) == 0) |
1da177e4 LT |
868 | /* can't write DVD-RAM media */ |
869 | cd->cdi.mask |= CDC_DVD_RAM; | |
870 | if ((buffer[n + 3] & 0x10) == 0) | |
871 | /* can't write DVD-R media */ | |
872 | cd->cdi.mask |= CDC_DVD_R; | |
873 | if ((buffer[n + 3] & 0x2) == 0) | |
874 | /* can't write CD-RW media */ | |
875 | cd->cdi.mask |= CDC_CD_RW; | |
876 | if ((buffer[n + 3] & 0x1) == 0) | |
877 | /* can't write CD-R media */ | |
878 | cd->cdi.mask |= CDC_CD_R; | |
879 | if ((buffer[n + 6] & 0x8) == 0) | |
880 | /* can't eject */ | |
881 | cd->cdi.mask |= CDC_OPEN_TRAY; | |
882 | ||
883 | if ((buffer[n + 6] >> 5) == mechtype_individual_changer || | |
884 | (buffer[n + 6] >> 5) == mechtype_cartridge_changer) | |
885 | cd->cdi.capacity = | |
886 | cdrom_number_of_slots(&cd->cdi); | |
887 | if (cd->cdi.capacity <= 1) | |
888 | /* not a changer */ | |
889 | cd->cdi.mask |= CDC_SELECT_DISC; | |
890 | /*else I don't think it can close its tray | |
891 | cd->cdi.mask |= CDC_CLOSE_TRAY; */ | |
892 | ||
893 | /* | |
894 | * if DVD-RAM, MRW-W or CD-RW, we are randomly writable | |
895 | */ | |
896 | if ((cd->cdi.mask & (CDC_DVD_RAM | CDC_MRW_W | CDC_RAM | CDC_CD_RW)) != | |
897 | (CDC_DVD_RAM | CDC_MRW_W | CDC_RAM | CDC_CD_RW)) { | |
fd2eb903 | 898 | cd->writeable = 1; |
1da177e4 LT |
899 | } |
900 | ||
1da177e4 | 901 | kfree(buffer); |
ebc95c79 | 902 | return 0; |
1da177e4 LT |
903 | } |
904 | ||
905 | /* | |
906 | * sr_packet() is the entry point for the generic commands generated | |
96eefad2 | 907 | * by the Uniform CD-ROM layer. |
1da177e4 LT |
908 | */ |
909 | static int sr_packet(struct cdrom_device_info *cdi, | |
910 | struct packet_command *cgc) | |
911 | { | |
8e04d805 HG |
912 | struct scsi_cd *cd = cdi->handle; |
913 | struct scsi_device *sdev = cd->device; | |
914 | ||
915 | if (cgc->cmd[0] == GPCMD_READ_DISC_INFO && sdev->no_read_disc_info) | |
916 | return -EDRIVE_CANT_DO_THIS; | |
917 | ||
1da177e4 LT |
918 | if (cgc->timeout <= 0) |
919 | cgc->timeout = IOCTL_TIMEOUT; | |
920 | ||
8e04d805 | 921 | sr_do_ioctl(cd, cgc); |
1da177e4 LT |
922 | |
923 | return cgc->stat; | |
924 | } | |
925 | ||
ba51bdaf CH |
926 | static int sr_read_cdda_bpc(struct cdrom_device_info *cdi, void __user *ubuf, |
927 | u32 lba, u32 nr, u8 *last_sense) | |
928 | { | |
929 | struct gendisk *disk = cdi->disk; | |
930 | u32 len = nr * CD_FRAMESIZE_RAW; | |
ce70fd9a | 931 | struct scsi_cmnd *scmd; |
ba51bdaf CH |
932 | struct request *rq; |
933 | struct bio *bio; | |
934 | int ret; | |
935 | ||
68ec3b81 | 936 | rq = scsi_alloc_request(disk->queue, REQ_OP_DRV_IN, 0); |
ba51bdaf CH |
937 | if (IS_ERR(rq)) |
938 | return PTR_ERR(rq); | |
ce70fd9a | 939 | scmd = blk_mq_rq_to_pdu(rq); |
ba51bdaf CH |
940 | |
941 | ret = blk_rq_map_user(disk->queue, rq, NULL, ubuf, len, GFP_KERNEL); | |
942 | if (ret) | |
943 | goto out_put_request; | |
944 | ||
ce70fd9a CH |
945 | scmd->cmnd[0] = GPCMD_READ_CD; |
946 | scmd->cmnd[1] = 1 << 2; | |
947 | scmd->cmnd[2] = (lba >> 24) & 0xff; | |
948 | scmd->cmnd[3] = (lba >> 16) & 0xff; | |
949 | scmd->cmnd[4] = (lba >> 8) & 0xff; | |
950 | scmd->cmnd[5] = lba & 0xff; | |
951 | scmd->cmnd[6] = (nr >> 16) & 0xff; | |
952 | scmd->cmnd[7] = (nr >> 8) & 0xff; | |
953 | scmd->cmnd[8] = nr & 0xff; | |
954 | scmd->cmnd[9] = 0xf8; | |
955 | scmd->cmd_len = 12; | |
ba51bdaf CH |
956 | rq->timeout = 60 * HZ; |
957 | bio = rq->bio; | |
958 | ||
b84ba30b | 959 | blk_execute_rq(rq, false); |
dbb4c84d | 960 | if (scmd->result) { |
ba51bdaf CH |
961 | struct scsi_sense_hdr sshdr; |
962 | ||
5b794f98 | 963 | scsi_normalize_sense(scmd->sense_buffer, scmd->sense_len, |
ba51bdaf CH |
964 | &sshdr); |
965 | *last_sense = sshdr.sense_key; | |
966 | ret = -EIO; | |
967 | } | |
968 | ||
969 | if (blk_rq_unmap_user(bio)) | |
970 | ret = -EFAULT; | |
971 | out_put_request: | |
0bf6d96c | 972 | blk_mq_free_request(rq); |
ba51bdaf CH |
973 | return ret; |
974 | } | |
975 | ||
1da177e4 LT |
976 | static int sr_remove(struct device *dev) |
977 | { | |
978 | struct scsi_cd *cd = dev_get_drvdata(dev); | |
979 | ||
6c7f1e2f AL |
980 | scsi_autopm_get_device(cd->device); |
981 | ||
1da177e4 | 982 | del_gendisk(cd->disk); |
01d0c698 | 983 | put_disk(cd->disk); |
1da177e4 LT |
984 | |
985 | return 0; | |
986 | } | |
987 | ||
988 | static int __init init_sr(void) | |
989 | { | |
990 | int rc; | |
991 | ||
992 | rc = register_blkdev(SCSI_CDROM_MAJOR, "sr"); | |
993 | if (rc) | |
994 | return rc; | |
da3962fe AM |
995 | rc = scsi_register_driver(&sr_template.gendrv); |
996 | if (rc) | |
997 | unregister_blkdev(SCSI_CDROM_MAJOR, "sr"); | |
998 | ||
999 | return rc; | |
1da177e4 LT |
1000 | } |
1001 | ||
1002 | static void __exit exit_sr(void) | |
1003 | { | |
1004 | scsi_unregister_driver(&sr_template.gendrv); | |
1005 | unregister_blkdev(SCSI_CDROM_MAJOR, "sr"); | |
1006 | } | |
1007 | ||
1008 | module_init(init_sr); | |
1009 | module_exit(exit_sr); | |
1010 | MODULE_LICENSE("GPL"); |